Technical Specification - bpdb.alltender.com

1 Section - 7. Technical Specification OF. 33kv OUTDOOR DROP OUT FUSE CUT-OUT AND FUSE LINK. AND. 33kv OUTDOOR TYPE. SINGLE PHASE METAL OXIDE (ZNO) GAPLESS LIGHTNING ARRESTER. 84. Technical Specification OF. 33kv OUTDOOR DROP OUT FUSE CUT-OUT AND FUSE LINK. This section covers the Specification , manufacture, design, testing and delivery of Drop Out Fuse Cut-out (DOFC) to the Stores of BPDB, Bangladesh. CLIMATE DATA. The equipments to be supplied against this tender shall be suitable for satisfactory use under the following climatic condition: Climate : Tropical, intense sunshine, heavy rain, humid. Maximum Humidity and Temperature sometimes occur simultaneously. Maximum Temperature : 400 C. Minimum Temperature : 030 C. Average daily Temperature : 300 C. Average isokeraunic level : 80 days/ year Relative humidity : 50-100%. Average annual rain fall : 3454 mm Maximum wind velocity : 200 km/ hour Altitude : Sea level to 300 metres Atmospherical, Mechanical and Chemical : Moderately polluted impurities Equipments as specified will be installed in tropical locations and in a hot humid environment with presence of the insects and vermin.

2 The information is given as a guide for Tenders and no responsibility for its accuracy will be accepted, nor will any claim based on the above be entertained. SYSTEM PARTICULARS. SL. SYSTEM CHARACTERISTICS VOLTAGE LEVEL. NO. 1. Normal Syste m V olta ge, KV. 230 132 33 11. (Voltage Cla ss). 3. Maximu m System V oltage, KV 245 145 36 12. 4. System Freq uen cy, Hz 50 50 50 50. 5. Phase Rota t ion RST RST RST RST. (Anti-Clock w ise). 6. T ype of Syste m Grou nding Solid Solid Solid Solid 7. Rated Fault Level (3-Phase Symmetrica l), MVA 3 sec. 12550 6000 1500 381. 8. Bas ic In stallat ion Level, KV 750 650 170 75. LOW VOL TAGE 41 5/ 24 0V CHAR ACTERISTICS: 9. Normal System Voltage, V. 415/ 240. (Voltage Cla ss). 10. Type of System Grounding Solid 85. STANDARDS. Performance, Design & Testing of Outdoor Drop Out Fuse Cut-out (DOFC) and Fuse Link shall conform to the latest edition of the IEC 282-2/ BS 729/ ANSI-C , & and NEMA Standard or equivalent international Standards unless otherwise specified herein General Specification 1.

3 Installation Outdoor mounted on cross-arm angle/. channel structure. 3. Application Protection of 33 , 250/200/. 100 KVA Distribution Transformer. 4. Type Open drop out expulsion. 5. Nominal rated voltage (3 phase) 33 KV. 6. Max. System voltage (3 phase) 36 KV. 7. Frequency 50 Hz. 8. Continuous Current Rating 200 A. 9. Basic Insulation Level (Impulse Voltage) 170 KV. 10. Power Frequency withstand Voltage 70 KV. (Across the Isolating distance of the fuse base). 11. Creepage Distance 25mm/KV (Minimum). 12. Fuse holder type Heavy duty, sealed cap with eye at upper end of the fuse holder. 13. Fuse link continuous ratings 5/10 Amps. 14. Fuse link type K-type as per NEMA standard, medium melting high surge. 15. Rated interrupting capacity, 8 KA (RMS). 16. Standard Design, manufacture, testing and performance shall be in accordance with the latest revision of relevant IEC-129 and NEMA Standard. FEATURES & ACCESSORIES. a) DOFC shall be with Guide. b) Each cut-out shall be completed including fuse holder and fuse link.

4 C) The design shall provide reasonable protection against earthing by animals or birds. d) The terminal shall be Tin-plated and shall be suitable to accommodate for ACSR Merlin/. Grossbeak/ Hawk or suitable conductor as required. e) All current carrying parts shall be of electrolytic high conductivity copper with the contacts hard drawn copper and silver-plated. f) Bracket shall be provided for steel cross-arm mounting with nuts bolts etc. g) All hardware shall be non-ferrous metal or if ferrous should be hot dip galvanized after fabrication in accordance to latest revision of relevant IEC/ BS Standard. h) Fused cut-out units to latest revision of relevant IEC standard are required to protect and provide insulator for distribution transformer. The unit shall be supplied complete with galvanized steel brackets bolt nuts and washers for mounting. They shall be provided with a latch mechanism, which will open the fuse element when the fuse has operated. The latch mechanism shall be constructed as to operate easily from the ground with the aid of an operating stick.

5 I) Insulators shall be of the post type made of porcelain to withstand a mechanical force of 1600N. Current carrying equipment shall be made of copper or copper alloy. The nominal rating of the unit shall be 200A. In addition the units shall be capable of being opened under 86. normal transformer magnetizing currents of transformers up to 250 KVA to permit transformer isolation. j) Termination shall be suitable for connection of compression terminal lugs. k) The fuse element shall be totally enclosed by a fuse holder to protect it from the atmosphere specified electrical characteristics of the fuse units shall be to latest revision of relevant IEC. standard. l) Fuse links for the fuse cut-out units shall be of the disconnecting type suitable for opening closing and removal by an operating stick. m) Each fuse link shall be suitable for a common fuse base. n) Each DOFC shall be furnished with a stainless steel rating plate mentioning manufacturer's name, clients name, year of manufacturer, contract no and model no in English.

6 INFORMATION REQUIRED. The Bidder/ Manufacturer as per tender requirements shall provide all information. Besides these, the following information/ Documents have to be submitted: (a) Detail Outline and General Arrangement drawings. (b) Manufacturer's printed catalogue describing Specification and Technical data of the offered type DOFC and Fuse Link (c) Maximum clearing time and minimum melting time curve characteristics for Fuse Link. (d) Manufacturer's ISO 9001 certificate. (e) 1 (one) no. sample of the offered type DOFC with 2 nos. Fuse Link of each size. DOCUMENTATION. The following documents are to be submitted along with the bid, otherwise the bid will be rejected : A. COMMERCIAL. Tenderer shall be eligible as per ITT Clause No. 4 and they should submit Bid validity, Bid Bond, Bid Bond validity, Price Schedule, Delivery Schedule, Authorisation of the signatory, Tender Submission Sheet, Tenderer Information Sheet & Documentary evidence for establishing the Tenderer's Qualifications, etc.

7 And all other documents including information related to rejection clause as per Tender Document. B. Technical . 1) Guaranteed Technical Particulars (GTP) shall be properly filled up and signed by both Manufacturer and Tenderer. 2) Letter of authorisation from the Manufacturers, in case, the bidder is not the manufacturer, in prescribed Form. 3) 2 (two) nos. of Manufacturer's Supply record for similar or higher rating of offered type DOFC. & Fuse Link within the last 5 (five) years from the date of opening in the following format (The supply record covering at least 25% of the tendered quantity in a single tender will be considered only): Sl. Name, Address, Phone No. Tender No. Tender Description Date of No e-mail & Fax No. & Date Value of material completion . of the Purchaser with of supply Quantity 1. 2. 4) Satisfactory Performance Certificates from at least 2 (two) Electricity Utility for similar or higher Current rating of same voltage class of offered Model/ Type DOFC & Fuse Link within the last 5 (five) years from the date of opening.

8 87. 5) Type Test Reports (as stated in Clause ) for offered type DOFC & Fuse Link from STL. (Short-Circuit Testing Liaison) members as per relevant Standards. 6) Manufacturers, who have supplied the same offered item to BPDB within the last 5 (five). years from the date of opening, shall submit Satisfactory Performance Certificate from Director, Purchase, BPDB, Dhaka, for the same offered item. 7) Bidder shall submit at least 1 (one) piece of offered type DOFC and 3 (three) pieces of each type of offered Fuse Links as samples along with the bid. The submitted sample(s) should comply the Technical requirements of the tender document. It is noted that the submitted sample(s) of the responsive Tenderer's will be tested as per latest version of relevant IEC/. BS or equivalent international standards as mentioned in the tender at CERS, BPDB or BUET/ CUET/ KUET/ RUET. If the submitted sample failed in test to conform the Technical Specification , the tender of the Tenderer will be rejected.

9 The cost of test will be borne by the purchaser. TEST REPORTS : The following Type Test reports along with test results for offered type DOFC and Fuse Link or higher current rating of same voltage class of design, confirming to the tender document shall be submitted with the offer from STL (Short-Circuit Testing Liaison) members as per latest revision of relevant IEC standard:-. a) Impulse Voltage withstand tests. b) Power Frequency withstand tests. c) Temperature Rise tests. d) Time/ Current Characteristics. APPROVAL OF DRAWING & Specification . Design, Drawing diagram, Specification and Technical Particulars & guarantees etc, shall be submitted to the Engineer, Director, Design & Inspection II, BPDB by the bidder for approval, prior to the manufacturing of the goods (DOFC with Fuse Link). The Bidder shall have to submit 3. (three) sets of the same for approval within 15 days from the date of issue of purchase order. TESTS AT MANUFACTURERS WORKS. General Functional electrical, material, mechanical and hydraulic tests shall be carried out at manufacturers' premises.

10 The extent and method of recording the results shall be agreed by the Purchaser in ample time to enable the tests to be satisfactorily witnessed or to make any changes to the proposed program of tests. Material Tests The supplier shall provide test pieces free of charge as required to enable the quality of the material to be determined at the supplier's expense. Purchaser may at its own discretion and by specific arrangement accept certified particulars of tests carried out in the absence of his authorized representative. Type Test Type tests are required to prove the general design of the offered equipments/ materials. The Tenderer shall submit the type test reports of the offered equipments/ materials from internationally reputed independent testing laboratory as per latest version of relevant IEC/ BS or equivalent international standards as mentioned in the tender as per relevant clause. Routine Tests 88. All equipments/ materials shall be subjected to routine tests as per latest version of relevant IEC/.